Toy block



FIG. 1 is a perspective view of a toy block showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof, the side opposite, the front and rear elevational views are all identical; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a toy block, as shown and described. 